CVE-2024-52702Public exploitNetwork attack vector

Stored script execution via crafted Website Name

Published Nov 20, 2024 · Updated Dec 8, 2025

The reported stored XSS in install/index.php in MyBB 1.8.38 allows remote authenticated users to execute script through a crafted Website Name. During create_admin_user(), the installer applies database and string escaping that does not neutralize HTML, then stores websitename in the database and inc/settings.php for later unescaped rendering. MyBB disputes the security impact because only an administrator performing installation can set the value, and administrators are already permitted to use JavaScript.

CVSS severity5.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

The reported stored XSS in install/index.php in MyBB 1.8.38 allows remote authenticated users to execute script through a crafted Website Name. During create_admin_user(), the installer applies database and string escaping that does not neutralize HTML, then stores websitename in the database and inc/settings.php for later unescaped rendering. MyBB disputes the security impact because only an administrator performing installation can set the value, and administrators are already permitted to use JavaScript.

The record

CVE
CVE-2024-52702
Published
Nov 20, 2024
Updated
Dec 8, 2025
Vendor
MyBB
Product
MyBB
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.8.38

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MyBB · MyBBversion=1.8.38

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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